In case you had any doubt that California’s Prop 37 — which would require labeling of food containing genetically-modified organisms (GMOs) — is a significant threat to industry, a top food lobby has now made it perfectly clear.

In a recent speech to the American Soybean Association (most soy grown in the U.S. is genetically modified), Grocery Manufacturers Association President Pamela Bailey said that defeating the initiative “is the single-highest priority for GMA this year.”

You may not know the Grocery Manufacturer’s Association, but its members represent the nation’s largest food makers — those with the most at stake in the battle over GMO labeling; for example, soft drink and snack giant PepsiCo, cereal makers Kellogg and General Mills, and of course, biotech behemoth Monsanto.

According to state filing reports, so far GMA has spent $375,000 on its efforts to oppose the labeling measure, with its members adding additional out-of-state lobbying power in the tens of thousands of dollars.

Never mind polling demonstrating that a whopping 90 percent of Californians think they deserve the right to know what they are eating. GMA also won’t bother to mention the more than 40 other nations (including the European Union, Brazil, and China) that already require food makers to disclose GMOs.